Regular Expressions 101

^start of line

Non-Capturing Group(?:[0-9A-F]{1,2})

Character Class[0-9A-F]{1,2}

{1,2}matches between 1 and 2 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

Non-Capturing Group(?:,[0-9A-F]{1,2})*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Character Class[0-9A-F]{1,2}

{1,2}matches between 1 and 2 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?:[0-9A-F]{1,2})(?:,[0-9A-F]{1,2})*$

1,2,3,4
A,B,C,D
10,11,12,13
10,AA,BB,CC
1,x
1
FF
FF,1